Semi LONG range connection. What to buy?

I am looking to create a link between home and work. Thats about 1,500ft rooftop to rooftop, perfectly clear Line Of Sight.
As for the AP or router, what model and what MFG is recommended to use for this connection?
AND
What antenna model and MFG? I was thinking of using a wire grid antenna.

How about installation? Liquid-tight polycarbonate box on the roof next to the antenna?

We have dshell 1.5m service at work, majority of the time it only produces 10-50kbps down. Whorrible! (horrible). The service I have here at home is 20/5Mbps, Company approved this to be done but entirely at my expense.

the long-distance connections in small-world networks produced by the semi-random SW strategy? In this paper, we attempted to investigate some related questions by constructing a semi-random small-world network through only randomly adding â€™long-range lattice distance connectionsâ€™ to a regular network.